Sound WavesHard
Question
A tuning fork of frequency 340Hz is vibrate just above the tube of 120 cm height. Water is poured slowly in the tube. What is the minimum height of water necessery for the resonance?
Options
A.45 cm
B.30 cm
C.40 cm
D.25 cm
Solution
We have v = vλ
or λ =
= 1m
First resonating length,.
l1 =
m = 25 cm
second resonating legth,
l2 =
= 75 cm
Third resonating length,
l3 =
= 125 cm
So third resonance is not possible since the length of the tube is 120 cm.
∴ Minimum height of water necessary for resonance = 120 = 75 = 45cm.
or λ =
= 1mFirst resonating length,.
l1 =
m = 25 cmsecond resonating legth,
l2 =
= 75 cmThird resonating length,
l3 =
= 125 cmSo third resonance is not possible since the length of the tube is 120 cm.
∴ Minimum height of water necessary for resonance = 120 = 75 = 45cm.
Create a free account to view solution
View Solution FreeMore Sound Waves Questions
Frequency of tuning fork A is 256 Hz. It produces 4 beats/second with tuning fork B. When wax is applied at tuning fork ...A car moves towards a hill with speed vc. It blows a horn of frequency f which is heard by an observer following the car...P, Q and R are three particles of a medium which lie on the x-axis. A sine wave of wave length λ is traveling throu...Dependence of disturbances due to two waves on time is shown in the figure. The ratio of their intensities I1 / I2 will ...The power of sound from the speaker of a radio is 20MW by turning the knob of the volume control the power of the sound ...